CVE-2021-3632

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-08-26 · updated 2026-06-17
Weakness: CWE-287

Description

A flaw was found in Keycloak. This vulnerability allows anyone to register a new security device or key when there is not a device already registered for any user by using the WebAuthn password-less login flow.

Affected products

Keycloak: before 15.1.0 — fixed in 15.1.0
Red Hat Single Sign-On: from 7.4 before 7.4.9; 7.0 — fixed in 7.4.9

How to fix

Upgrade to a fixed version: Keycloak 15.1.0; Red Hat Single Sign-On 7.4.9. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2021-3632
https://bugzilla.redhat.com/show_bug.cgi?id=1978196
https://github.com/keycloak/keycloak/commit/65480cb5a11630909c086f79d396004499fbd1e4
https://github.com/keycloak/keycloak/pull/8203
https://issues.redhat.com/browse/KEYCLOAK-18500
https://access.redhat.com/security/cve/CVE-2021-3632
https://bugzilla.redhat.com/show_bug.cgi?id=1978196
https://github.com/keycloak/keycloak/commit/65480cb5a11630909c086f79d396004499fbd1e4
https://github.com/keycloak/keycloak/pull/8203
https://issues.redhat.com/browse/KEYCLOAK-18500

Get alerted when CVE-2021-3632 or the next vulnerability affects your stack